EP3820029A1 - Filtre lcl - Google Patents

Filtre lcl Download PDF

Info

Publication number
EP3820029A1
EP3820029A1 EP19207847.5A EP19207847A EP3820029A1 EP 3820029 A1 EP3820029 A1 EP 3820029A1 EP 19207847 A EP19207847 A EP 19207847A EP 3820029 A1 EP3820029 A1 EP 3820029A1
Authority
EP
European Patent Office
Prior art keywords
filter
winding
magnetic core
outn
inn
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP19207847.5A
Other languages
German (de)
English (en)
Inventor
Radoslaw Jez
Milosz Miskiewicz
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ABB Schweiz AG
Original Assignee
ABB Schweiz AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by ABB Schweiz AG filed Critical ABB Schweiz AG
Priority to EP19207847.5A priority Critical patent/EP3820029A1/fr
Priority to US17/091,358 priority patent/US11658561B2/en
Publication of EP3820029A1 publication Critical patent/EP3820029A1/fr
Pending legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/14—Arrangements for reducing ripples from dc input or output
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/12—Arrangements for reducing harmonics from ac input or output
    • H02M1/126—Arrangements for reducing harmonics from ac input or output using passive filters
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/24—Magnetic cores
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/28—Coils; Windings; Conductive connections
    • H01F27/30—Fastening or clamping coils, windings, or parts thereof together; Fastening or mounting coils or windings on core, casing, or other support
    • H01F27/306—Fastening or mounting coils or windings on core, casing or other support

Definitions

  • the present invention relates to LCL filter for one or 3 phase systems.
  • Filters are widely used in power electronic converters to fulfill the requirements of power supply quality.
  • converters are connected to loads via transformers.
  • the typical filter system is based on LCL topology which includes three components: an inverter side inductor, a grid side inductor and a filter capacitor.
  • the sinusoidal wave is transferred from the inverter side to the grid side of the filter.
  • Current ripples are closed between the inverter side inductor and the filter capacitor.
  • the European patent EP1805879B1 discloses a multiphase passive filter, in particular the three-phase filter, in which an input and output choke are integrated on a single magnetic core.
  • the winding of the choke is divided into at least two parts and to such a point of division capacity is galvanically connected, so the branch with capacitors is a combination of inductance-capacity.
  • German patent application DE102011102134A1 discloses a filter for coupling an AC voltage source with a network impulse transducer circuit, where the output choke is divided into two chokes. One choke is located on the common core with the input choke and the other choke is a separate component.
  • the filter can be used in both single-phase and three-phase networks.
  • the international patent application WO0062396 discloses a LCL filter containing a magnetic core with air gap, in which the filter and capacitor circuit are galvanically connected to the point between the input and output windings.
  • the filter can be used in single-phase and three-phase networks.
  • the object of the invention is to provide a filter without the above drawbacks.
  • LCL filter for 1 or 3-phase grid comprising one magnetic core, at least one primary winding L INn , at least one secondary winding L OUTn , at least one winding Lf n for reducing flux ripples in the magnetic core, located between the primary winding L INn and the secondary winding L OUTn , wherein said windings L INn , L OUTn , L fn are placed on the magnetic core, the primary winding L INn is connected to the input F INn of said LCL filter for connecting the filter to an inverter, the secondary winding L OUTn is connected to the output F OUTn of said LCL filter for connecting the filter to a load or a grid and winding Lf n is connected to the filter capacitor Cf n characterized in that the magnetic core is a closed magnetic core and said windings L INn , L OUTn , L fn are galvanically insulated.
  • At least one winding L fn is connected to the at least one filter capacitor C fn by a dumping resistor R fn .
  • the magnetic core preferably comprises three columns wherein each column comprises one primary winding L INn , one secondary winding L OUTn and one winding L fn .
  • the proposed solution allows on the integration of output filter and transformer functionality within one compact component instead of two separated inductors and capacitor bank known in the state of the art. It reduces the required space and costs of implementation and it increases output efficiency of a system consisting of an inverter and an LCL filter. Additionally, the galvanic insulation between an input and an output allows on coupling of an inverter, filtering capacitors and output at different voltage and current ratings. What is more the LCL filter according the invention provides better attenuation.
  • a one-phase LCL filter 1 comprising one closed magnetic core 2, one primary winding L IN1 , one secondary winding L OUT1 , one winding Lf 1 for reducing flux ripples in the magnetic core 2 located between the primary winding L IN1 and the secondary winding L OUT1 .
  • Said windings L IN1 , L OUT1 , L f1 are placed on the magnetic core 2 and are galvanically insulated.
  • the primary winding L IN1 is connected to the input F IN1 of said LCL filter 1 which is connected to a one-phase inverter.
  • the secondary winding L OUT1 is connected to the output F OUT1 of said LCL filter 1 which is connected to a one-phase load or grid.
  • the third winding Lf 1 is connected to the filter capacitor Cf 1 .
  • a primary winding L IN1 is connected to the output current of an inverter (sinusoidal current with ripples) by the input F IN1 of the LCL filter 1 .
  • the output current of the inverter produces a flux in a magnetic core 2 (sinusoidal flux with ripples).
  • This flux induces voltage in the winding L f connected to a capacitor Cf 1 (low impedance for ripples, high impedance for low harmonic).
  • Current ripples in the circuit C f -L f produces flux ripples with the opposite direction to flux ripples produced by the output current of the inverter.
  • the same, flux ripples in the magnetic core 2 are reduced.
  • the other part of the magnetic flux has the sinusoidal shape and induces the sinusoidal current without ripples in an output winding L OUT1 .
  • Figure 1 shows a one-phase LCL filter 1 comprising one closed magnetic core 2 , one primary winding L IN1 , one secondary winding L OUT1 , one winding Lf 1 for reducing flux ripples in the magnetic core 2 located between the primary winding L IN1 and the secondary winding L OUT1 .
  • Said windings L IN1 , L OUT1 , L f1 are placed on the magnetic core 2 and are galvanically insulated.
  • the primary winding L IN1 is connected to the input F IN1 of said LCL filter 1 which is connected to a one-phase inverter.
  • the secondary winding L OUT1 is connected to the output F OUT1 of said LCL filter 1 which is connected to a one-phase load or grid.
  • the third winding Lf 1 is connected to the filter capacitor Cf 1 by a dumping resistor R f1 .
  • a three-phase LCL filter 1 comprising three primary windings L IN1 , L IN2 , L IN3 , three secondary winding L OUT1 , L OUT2 , L OUT3 and three windings L f1 , L f2 , L f3 for reducing flux ripples.
  • each column 3 comprises one primary winding L IN1 , L IN2 , L IN3 , one secondary winding L OUT1 , L OUT2 , L OUT3 and one winding L f1 , L f2 , L f3 located between the primary windings L IN1 , L IN2 , L IN3 and the secondary windings L OUT1 , L OUT2 , L OUT3 .
  • the primary windings L IN1 , L IN2 , L IN3 are connected to the inputs F IN1 , F IN2 , F IN3 , of said LCL filter 1 for connecting the filter to an inverter.
  • the secondary windings L OUT1 , L OUT2 , L OUT3 are connected to the outputs F OUT1 , F OUT2 , F OUT3 , of said LCL filter 1 for connecting the filter to a load or a grid and the windings L f1 , L f2 , L f3 are connected to the filter capacitors Cf 1 , Cf 2 ,Cf 3 .
  • Said windings L INn , L OUTn , L fn are galvanically insulated.
  • Figure 2 shows a three-phase LCL filter 1 comprising three primary windings L IN1 , L IN2 , L IN3 , three secondary winding L OUT1 , L OUT2 , L OUT3 and three windings L f1 , L f2 , L f3 for reducing flux ripples.
  • Said windings are placed on a closed magnetic core 2 comprising three columns 3 wherein each column 3 comprises one primary winding L IN1 , L IN2 , L IN3 , one secondary winding L OUT1 , L OUT2 , L OUT3 and one winding L f1 , L f2 , L f3 .
  • the primary windings L IN1 , L IN2 , L IN3 are connected to the inputs F IN1 , F IN2 , F IN3 , of said LCL filter 1 for connecting the filter to an inverter.
  • the secondary windings L OUT1 , L OUT2 , L OUT3 are connected to the outputs F OUT1 , F OUT2 , F OUT3 , of said LCL filter 1 for connecting the filter to a load or a grid and the windings L f1 , L f2 , L f3 are connected to the filter capacitors Cf 1 , Cf 2 ,Cf 3 by a dumping resistors R f1 , R f2 , R f3 .
  • Said windings L INn , L OUTn , L fn are galvanically insulated.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Filters And Equalizers (AREA)
EP19207847.5A 2019-11-07 2019-11-07 Filtre lcl Pending EP3820029A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP19207847.5A EP3820029A1 (fr) 2019-11-07 2019-11-07 Filtre lcl
US17/091,358 US11658561B2 (en) 2019-11-07 2020-11-06 LCL filter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19207847.5A EP3820029A1 (fr) 2019-11-07 2019-11-07 Filtre lcl

Publications (1)

Publication Number Publication Date
EP3820029A1 true EP3820029A1 (fr) 2021-05-12

Family

ID=68501344

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19207847.5A Pending EP3820029A1 (fr) 2019-11-07 2019-11-07 Filtre lcl

Country Status (2)

Country Link
US (1) US11658561B2 (fr)
EP (1) EP3820029A1 (fr)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4422056A (en) * 1981-09-28 1983-12-20 General Electric Company Integrated multi-stage electrical filter
WO2000062396A1 (fr) 1999-04-09 2000-10-19 1061933 Ontario Inc. Systeme attenuateur d'harmonique universel
EP1805879B1 (fr) 2004-10-29 2008-05-07 Brinkmann GmbH&Co. KG Filtre reseau polyphase
ES2334532A1 (es) * 2007-10-30 2010-03-11 Universidad Carlos Iii De Madrid Metodo de optimizacion del diseño de componentes magneticos integrados y componente magnetico integrado obtenido por dicho metodo.
DE102011102134A1 (de) 2011-05-18 2012-11-22 Block Transformatoren-Elektronik Gmbh Filterschaltung
US9595906B2 (en) * 2014-09-26 2017-03-14 Fanuc Corporation Motor control apparatus having function for protecting LCL filter

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5523673A (en) * 1994-03-04 1996-06-04 Marelco Power Systems, Inc. Electrically controllable inductor
KR100983033B1 (ko) * 2008-03-17 2010-09-17 삼성전기주식회사 집적화된 트랜스포머 및 이를 이용한 전원 장치
KR102318230B1 (ko) * 2014-12-11 2021-10-27 엘지이노텍 주식회사 인덕터
JP6711859B2 (ja) * 2018-04-04 2020-06-17 ファナック株式会社 モータ駆動装置およびモータ駆動装置の異常発熱検出方法

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4422056A (en) * 1981-09-28 1983-12-20 General Electric Company Integrated multi-stage electrical filter
WO2000062396A1 (fr) 1999-04-09 2000-10-19 1061933 Ontario Inc. Systeme attenuateur d'harmonique universel
EP1805879B1 (fr) 2004-10-29 2008-05-07 Brinkmann GmbH&Co. KG Filtre reseau polyphase
ES2334532A1 (es) * 2007-10-30 2010-03-11 Universidad Carlos Iii De Madrid Metodo de optimizacion del diseño de componentes magneticos integrados y componente magnetico integrado obtenido por dicho metodo.
DE102011102134A1 (de) 2011-05-18 2012-11-22 Block Transformatoren-Elektronik Gmbh Filterschaltung
US9595906B2 (en) * 2014-09-26 2017-03-14 Fanuc Corporation Motor control apparatus having function for protecting LCL filter

Also Published As

Publication number Publication date
US11658561B2 (en) 2023-05-23
US20210143726A1 (en) 2021-05-13

Similar Documents

Publication Publication Date Title
US10804812B1 (en) Three phase AC/DC power converter with interleaved LLC converters
TWI454028B (zh) System interconnection converter
US7728544B2 (en) System and method for controlling input line harmonics in a motor drive
EP1619768A1 (fr) Flitre avec noeuds de dérivation virtuels
EP2270968B1 (fr) Procédé et dispositif pour la transmission d'énergie éléctrique
Ohn et al. Differential-mode and common-mode coupled inductors for parallel three-phase AC–DC converters
US11418106B2 (en) Apparatus for conversion between AC power and DC power
EP2876794B1 (fr) Filtre EMI d'entrée et méthode pour entraînement moteur comprenant un redresseur actif
US11303196B2 (en) Apparatus for conversion between AC power and DC power
GB2459764A (en) DC power transmission system
US11658561B2 (en) LCL filter
EP3890173A1 (fr) Système de filtre pour un circuit convertisseur
JP6045664B1 (ja) 電力変換装置
EP3742596B1 (fr) Convertisseur de puissance
EP2824788A1 (fr) Dispositif inducteur autocouplé à noyau unique
WO2020115360A1 (fr) Conception d'onduleur comprenant un inducteur non linéaire
JPS6335167A (ja) 調波電流分離回路網
US10298113B2 (en) Filter for a power network
Zhang et al. Differential mode EMI filter design for 100 kW SiC filter-less PV inverter
JP2006294803A (ja) 変圧器
US11863085B2 (en) Converter assembly
Choi et al. Design technique of coupled inductor filter for suppressing switching ripples in PWM converters
US11114932B1 (en) Method and apparatus for reduction of ripple current
US20240235195A1 (en) Power-electronic device comprising a transformer unit and method
EP3761500A1 (fr) Convertisseur de puissance monophasé ou multiphasé galvaniquement isolé

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN PUBLISHED

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE

17P Request for examination filed

Effective date: 20211025

RBV Designated contracting states (corrected)

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: EXAMINATION IS IN PROGRESS

17Q First examination report despatched

Effective date: 20220824